The medallion's obverse bears bust of Charles Doolittle Walcott facing right. To left and right, CHARLES - DOOLITTLE / WALCOTT; around bottom, PRECAMBRIAN RESEARCH MEDAL; signed under truncation, LAVRA GARDIN FRASER SCVLPTOR
The reverse bears the picture of a trilobite. On lower half, NATIONAL - ACADEMY / OF / SCIENCES
Charles Doolittle Walcott (1850 - 1927) was a paleontologist, early member of the U.S. Geological Survey, Secretary of the Smithsonian Institute and President of the American Association for the Advancement of Science.
The medal, designed in 1931 but first awarded in 1934, is awarded every five years by the National Academy of Sciences for outstanding work in the field of pre-Cambrian and Cambrian life and history. Since 2008, the Walcott Medal and the Stanley Miller Medal are presented alternately, collectively known as the NAS Award in Early Earth and Life Sciences.
The medallion measures 102mm in diameter and was struck in bronze by the Medallic Art Company of New York. No mintage has been reported.
Many thanks to a collector who wishes to remain anonymous for the images of this beautiful medal.
References: MACo 1931-006